Everyone knows the Earth has constantly evolved over the course of billions of years, and the natural landscapes we see today ...

The earliest lifeforms, cyanobacteria, appeared around 4 billion years ago. These organisms, now known as algae, were among the first to engage in oxygenic photosynthesis.

Ancient oceans, which were heavy on iron, interacted differently with light wavelengths, retracting green light into the ...

Instead, they were a striking shade of green, shaped by ancient microbial life and the chemical composition of early seas.

Earth’s oceans may not have always been as brilliantly blue as they are today. In fact, there may have been a time when they weren’t blue at all. According to researchers at Japan’s Nagoya ...

Earth was so cold at the time that the oceans were frozen all the way to the ... all of which may have contributed to the early development of life, the University of Portsmouth said in a release.

A photo of the earth and its oceans taken from space. The photo has been changed so we can see all of the earth’s surface in one picture. The Pacific Ocean is the world’s largest ocean.

For centuries, Earth’s oceans have always been blue. However, research states that oceans will turn green again soon. By again, I mean, once upon a time the oceans used to be green; now, they are blue ...

Critics of this hypothesis argue that the oceans were—and still are—too ... an electrical current to a mixture of water and Earth’s early inorganic gases, including methane, ammonia, and ...

Around 700 million years ago, Earth was ... ocean became enriched in minerals, the prevailing hypothesis was that this was the product of an oxygenating planet. As early cyanobacteria produced ...